Insert wrench



Patented Jan. 13, 1925.

UNITED STATES WILLIAM r. MILLIGAN,

OF CHICAGO, ILLINOIS.

INSERT WRENCH.

Application filed June 5,

To all whom t may concer/n: i

Be it known that I, WILLIAM F. MILLIGAN, a citizen of the United States of America,

` residing at Chicago, in the county of Cook and State o1 Illinois, have invented certain new and useful Improvements in Insert lVrenclies, of which the following is a specication.

My invention relates to improvements in devices for removing or inserting bushings and the like.

Bushings, pipe sleeves, valve seats and the like often become worn, and in removing them, the members into which they are screwed, are usually damaged and necessitate the replacement of very eX- pensive parts when all that needs replacement is a very inexpensive article.

An important object of my invention is to pro-vide a device which will easily remove bushings and the like which have become rusted or scaled into place, and

which will operate in a very restricted s ace.

pAnother obj ect of my invention is to provide a device of this character which will be formed of few and simple parts, and

which will be strong and durable in use.

Other objects and advantages of my invention will be apparent during the course of the following description.

In the accompanying drawings which form a part of this specication, and where- Vin like characters of reference designate .like or corresponding parts throughout the same:

Figure 1 is a sectional view through a valve seat or bushing having my improved device applied thereto, and shown in elevation;

Figure 2 is a perspective view of the several parts of the device;

Figure 8 is a side elevation of the plug;

Figure 4 is an end elevation of the same;

Figure 5 is a top elevation of the device, showing the plug in section,;and

Figure 6 is a similar view of a modification.

In the drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates the valve seat or bushing which is to be removed. This is illustrated as an air pump valve seat which is used on aero-V 1924. Serial No. 718,072.

is merely illustrative of one application of my invention. In carrying out my invention, I provide the split sleeve 11 made up of the two semicircular sections 12` which are adapted to be arranged within the bushing or the like to be removed. This split sleeve has a rectangular, longitudinally arranged opening 13 in its center, half of which is in one section 12, and the other half in the other section. The sides 111 of the opening, representing the longer side of the rectangle, are slightly tapered, and the periphery of the sleeves adjacent these sides 111 is provided with teeth 15, which are arranged at diametrically points.

The plug 16 is rectangular in cross section and of a size to snugly it within the opening 13 of the split sleeve. The longer side 17 of the plug is tapered, and the shorter side 18 is not. Shoulders 19 are arranged adjacent one end of the plug and form a square head 20 at said end ot' the plug.

l/Vhen the plug is inserted in the opening 13, the tapered sides 17 will bear against the tapered sides 14. of the opening, but the short sides 18 will not bear against the short side of the opening. Vhen the plug is driven into the opening, the sleeve sections 12 will be expanded and will grip the interior of the bushing or the like to be extracted. It will be seen that the strain will be placed on the portions of the periphery of the sleeve provided with the teeth and not on the other portions, and these teeth will be made to firmly grip the bushing to be extracted. By having the plug and opening rectangular instead o1 square, or some other shape, the tapered sides 12 will always be adjacent the teeth, and there is no chance oil getting the plug in the wrong position.

When the plug has been driven in, an ordinary open or box wrench is applied to the Square head of the plug as shown in dotted lines in Figure 1 and by turning the wrench, the bushing will be readily removed without damage to any other parts and without danger of slipping.

In the modification shown in Figure 6, the teeth 15 are pitched in the reverse di rection. This modication can be used to insert bushings and the like and the operation will be the same as described.

The sleeve sections are preferably made opposite i lil) case hardened nor temperate, so that the wrench will hold up. uIlCler all conditions of use, and the teeth Will not be injured by use.

I'Vhile I have shown and described the preferred embodiment of my invention, it is to be understood that various changes in the shape, size and arrangement of parts may beresorted to ivit-hout departing from the yspirit of my invention or thescope of the subjoined claims.

Having described my invention what I clainiand desire to protect by Let-ters Pat- @,fltls:

`LA `device of the character described comprising a split sleeve having an opening therein in theform of an irregular polygon, and a plug of corresponding configuration adapted to beinserted therein to expand the'jsame certain onlyot'the faces of said plugbeing tapered, said plug being capable ojtf` insertion in sa'id opening only when in certain relative positions with respect thereto whereby the tapered faces of the plug Will engage only certain faces of the opening.

`2. A device ofthe character described comprisinga split sleeve having an opening thereimadapted toreceive a plug to expand said sleeve, teeth arranged upon a portion of thelperiphery ot' said sleeve, and means whereby ressu're is exerted only upon theV portion ot the sleeve adjacent theteeth.

8. A device of the character described comprising a split sleeve having an opening therein, teeth arranged upon a portion'only oftheperipheiy of the sleeve, and a plug adapted to be inserted into said opening portion ot comprising a split sleevevhaving a rectangulaiopeningtherein, one pair Vot the sides ot' said opening being longer thanrthe other,

teeth arranged upon the periphery ofthe sleeve adjacent-one of the sides of the opening, and a rectangularplug adaptedto be inserted in the opening in the sleeve and having one oi' its sides tapered, saidftapered 'side being' adapted to engage the sideqof the opening'adjacentthe teeth.

6. A device of the character coinprisinga split` sleeve, having a rectangularopening therein, one pair ot the sides of said opening being longer than the other,

described o. A deviceV of he character described.

teeth arranged upon the periphery ofthe. sleeve adjacent one of the longer sides of the opening, and a rect-angularplug. adapted Vto be inserted in the opening inthe sleeve, said ,plug-having one ofitspairsfof sides longer than the other, vone ot' said longer sides being tapered andrjadpaptedto engage one oft the longer sides ot 4the open ing in the sleeve.

In' testimony whereof I arfiiX my signature.

n "WILLIAM `F. MILLIGAN. I 

